Other than the obvious (location), the biggest difference I can think of is that Springfield imports and markets firearms from other makers.
No
made by Colt 1913. not unusual if you have a springfield slide on your Colt 1911
made by Colt in 1918. not unusual to see a springfield slide on a Colt frame
made by Colt in 1918. not unusual to see springfield slide on Colt frame
made by Colt in 1914. not unusual to see a springfield slide on a Colt frame
made in 1916 by Colt. Your Colt has a Springfield slide, which is not unusual.
I seriously doubt it.
it was made by Colt in 1918. If there is a springfield slide on the gun the it was put there later on. Not unusual to see a springfield slide on a colt receiver
made by Colt in 1914. not unusual to see a springfield slide on a colt frame.
made by Colt for US Navy. not unusual to see a springfield slide on a Colt frame
Your 1911 was made by Colt in 1918.......... you may have a springfield slide on it...
made by Colt in 1918. not unusual to see springfield slide on a Colt frame